GROUNDWATER RECHARGE ESTIMATION USING ARCGIS-CHLORIDE MASS BALANCE APPROACH

  • Lee Ju Young (School of Environmental and Water Resource Engineering, Department of Civil Engineering, Texas A&M University) ;
  • Krishinamurshy Ganeshi (School of Environmental and Water Resource Engineering, Department of Civil Engineering, Texas A&M University)
  • Published : 2005.01.01

Abstract

Groundwater recharge is defined in an addition of water to groundwater reservoir. Recently, many people have been moving to the Edwards aquifer and urban and agricultural industry have been expending. Hydrologists and water planning managers concern about insufficient groundwater amounts and irrigation water price variability. In this paper, I focus on estimates of local recharge volumes and quantify preferential flow through GIS technique. Chloride Mass Balance (CMB) and hydrochemical components have been widely applied to recharge rate and evaluate flow paths. The CMB method is based on relationship between wet-dry chloride deposition data and Rainfall data. These data are manipulated using ArcGIS. Especially, hydrochemical concentration distribution is good index for groundwater residence times or flow paths such as $[Mg^{2+}]/[Ca^{2+}],[Cl]$ and log$([Ca^{2+}]+[Mg^{2+}])/[Na^+]$. Well information such as hydrological-hydrochemical data are imported into ArcGIS and manipulated by interpolation techniques. For each potentiometric surface and water quality, point data are converted to spatial data through each Kriging and Inverse Distance Weighted (IDW) techniques.

Keywords

References

  1. Barker, R. A., and Ardis, A. F., 1996a, Hydrogeologic framework of the EdwardsTrinity aquifer, West-Central Texas: United States Geological Society Professional Paper 1421-B, 61 p.
  2. Hope, D., Anderson, J., Grimm, N.B., and Clay, M., 2001, Wet and dry atmospheric deposition of major nutrients across the CAP LTER ecosystem: http:/caplter.asu.edu/Symposia/symp2001/HopeAtmDep/
  3. Johnston, K., Ver Hoef, J.M., Krivoruchko, K., and Lucas, N., 2001. Using ArcGIS Geostatistical Analyst. ESRI
  4. Kuniansky, E. L., 1989, Precipitation, streamflow, and baseflow in west-central Texas, December 1974 through March 1977: United States Geologic Survey Water-Resources Investigations Report 89-4208, 2 sheets
  5. Kuniansky, E. L., and Holligan, K. Q., 1994, Simulations of flow in the Edwards-Trinity aquifer system and contiguous hydraulicallyconnected units, west-central Texas: U.S. Geological Survey Water-Resources Investigations Report 93-4039, 40 p., 3 plates
  6. Nance, H. S., 2003, Hydrochemical Variability in the Edwards-Trinity Aquifer System, Edwards Plateau, Texas, Groundwater Reports, Chapter 3. http://www.twdb.state.tx.us/publications/repo rts/GroundWaterReports/GWReports/R360AEPC/Ch03.pdf
  7. Rose, P. R., 1972, Edwards Group, surface and subsurface, central Texas: The University of Texas at Austin, Bureau of Economic Geology Report of Investigations 74, 198 p.